Justification:
This species inhabit an area of about 681,000 km² from Turkey to Turkmenistan. Some populations were flourishing in the past but a significant number of these localities either are currently destroyed from year to year through urbanization, gravel pitting directly in streams, stream dragging and water harnessing. The rapid ongoing tourist development and demographic expansion of the Turkish south coast, from where were known the best populations, led to the loss of many localities so that in this area the species will be threatened of extinction within the next decade. An overall reduction of 30% is likely within the next 10 years.